Centrifugal governor



(No Model.)

L. OHARA. GENTRIPUGAL GOVERNOR.

No. 522,382. Patented July 3, 1894.

Zjifd WITNESSES: I NYVENTORI A ATTORN EY To aZZ whom itmay concern:

UNITED STATES" PATENT OEEIcE.

LEWIS OHARA, OF AUBURN, NEW YORK.

CENTRIFUGAVL eovERNoR.

SPECIFICATION forming part of Letters Patent No. 522,382, dated July 3,1894.

Application filed March 24,1894. Serial to. 504,906. (No modelJ Be it known that l, LEWIS OHA'RA, of Auburn, in the county of Cayuga, in the State of New York, have invented new and useful Improvements in Centrifugal Governors, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

Thisinvention relates to the class of steamengine governors in which a lateral movable eccentric is hung on the fly-wheel or driving pulley and carried toward and from concentricity with the shaft by means of gravitat- 1ng levers pivoted to the wheel. And the invention COHSiSlJS'lIl an improved construction of the component parts of the governor which is efficient and reliable in its operation.

The invention is illustrated in the annexed drawings, in which Figure 1 is a face view of agovernor embodying my improvements. Fig. 2 is a transverse section on line-X'-'X in Fig. 1. 'Fig. 3 is a detached side View of the pendulum. Fig.4. is a detached side view of the radially movable arm, and Fig. 5 is a transverse section of a modification of the attachment of the eccentric to the pendulum and the arrangement of the governor in relation to the wheel and shaft.

Similar letters of referen sponding parts.

-A- represents the main'driving shaft of a steam-engine and --B the fly-wheel or main driving pulley which is fastened to said shaft.

(ldenotes the pendulum which is pivoted at one end to the side of the wheel B as shown at a s. The free end of the pendulum is formed with a'rin'g --O which surrounds the shaft -A-' andjhas its internal diameter larger than the diameter of the shaft or elongated as shown at bto permit the pendulum to oscillate on its pivot. Said ring is formed with an annular hub --c to the end of which is fastened in any suitable man-j nor the eccentric ewhich actuates the valve in the steam-chest of the engine and thus controls the movement of the engine in the usual and well known manner. The oscillatory pendulum --G serves to support the eccentric movable laterally toward and from concentricity with the shaft A*-.

e indicate corre-- -II represent centrifugal levers which are pivoted to the wheelat opposite sides of the sleeve 0Z- as shown at f-f in Fig. l of the drawings. The free ends of these levers are connected to the radially movable arm -D- by links or straps --hhr pivoted to said parts to permit them to move freely when the engine is in operation.

The free ends of the levers -I-I I make adj nstable in their weight preferably by forming the same with pockets z'c'- for the reception of more or less weights.

The eccentric e may be attached either to the exterior of the hub cas shown in Fig. 2 of the drawings or in an annular rabbet -rformed inside of the aforesaid hub as represented in Fig. '5 of the drawings. Said figures also illustrate the adaptability of placing-the eccentric either over the shaft -A'' or over the hub --B of the wheel.

. '-H-- represents a bow spring which is fastened at the center of its length to one of the spokes of the wheel. Between the ends of this spring and adjacent levers are interposed longitudinally adjustable pushers by means of which the spring presses the levers toward their normal positions and said pressing the screws -n'- which bear with their outer ends in recessed seats o attached to the ends of the spring as shown in Fig. 1 ofthe drawings.

In the operation of the engine, the centrifugal force exerted on the levers --I*I- causes them to swing-outward to a greater or less distance according to the speed of the engine. The outward movement of said levers causes IOO them to draw inward the radially movable arm -D- which pushes the ring-cof the pendulum -C-- toward concentricity with the shaft -A and consequently the eccentric -ewhich is fastened to said ring is carried into a corresponding position in relation to the shaft. Said varying position of the eccentric regulates the stroke of the valve in the steam-chest of the engine.

It will be observed that in my improved governor, all the moving members are pivoted so as to obviate binding the same.

What I claim as my invention is- 1. The improved centrifugal governorconsisting of a pendulum pivoted to the fiy-wheel or pulley and having its free end astride the shaft and free therefrom, the eccentric attached to said pendulum to move with the same, centrifugal levers pivoted to the wheel or pulley, a radially movable arm connected to the pendulum and links connecting the said arm to the centrifugal levers as set forth.

2. In a centrifugal governor, the oscillatory eccentric carried on the free end of a pendulum pivoted to the wheel, a sleeve pivoted to said wheel, a radially movable arm connected to the free end of the pendulum and, passing with its free end through the aforesaid sleeve, centrifugal levers pivoted to the Wheel at opposite sides of the aforesaid sleeve, and links connecting the aforesaid arm to the centrifugal levers as set forth.

3. In combination with the wheel,a pendu- I lum pivoted to said wheel and formed at its free end with a ring surrounding the shaft and of a larger internal diameter to permit vibration of the pendulum,said ring being provided with an annular hub, a sleeve pivoted to the wheel, a radially movable arm formed with a ring embracing the aforesaid hub and having its free end sliding in the aforesaid sleeve, the eccentric fastened to the hub of the pendulum, centrifugal levers pivoted to the wheel at opposite sides of the aforesaid sleeve and links connecting said levers to the radially movable arm substantially as set forth and shown.

4.. In combination with the wheel,a pendulum pivoted to said wheel and provided atits free end with a ring formed with an elongated eye surrounding the shaft and with an annular hub, a radially movable arm formed at one end with a ring riding on said hub, a sleeve pivoted to the wheel and having sliding therein the free end of theaforesaid arm, the eccentric fastened to the hub of the pendulum, centrifugal levers pivoted to the wheel at opposite sides of the sleeve, links connecting the aforesaid arm to said levers, and a bow-spring fastened at its center to one of the spokes of the wheel, and longitudinally adjustable pushers interposed between the ends of the spring and adjacent centrifugal levers substantially as set forth and shown.

In testimony whereofIhavehereuntosigned my name this 17th day of March, 1894.

LEWIS OHARA.

Witnesses:

O. L. BENDIXON, O. E. TOMLINSON.

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